If you think running a marathon sounds like an incredible feat, consider this: One man just ran the equivalent of a marathon every day for more than two years.

British ultramarathon runner Kevin Carr, 35, just set a world record after completing his run around the world, breaking the previous record by just one day. Carr covered the 16,300 miles in 621 days (an average of more than 26 miles per day), dropping 42 pounds and going through 16 pairs of running shoes. (This is as crazy as we get: 10 Destination Races to Run Before You Die.) Carr is the youngest person to run around the world and the first runner to circumnavigate the globe unsupported—unlike the previous record holder, Carr traveled alone and pushed all his own equipment, including food, water, and camping supplies that weighed upwards of 100 pounds, Runners Worldreports.

Carr ran through 26 countries, pushing through harsh conditions like below zero temperatures in the northeastern United States and extreme flooding in Argentina. Elsewhere in the world, Carr had to deal with the flu, severe heatstroke, a quad injury, and pursuit by both a black bear and a pack of wild dogs, not to mention being hit by a car—twice. Still, Carr powered through, making up time he lost by averaging 45 miles a day for the last month. (Feel like an underachiever? Don't—these 25 Good Reasons Not to Run a Marathon are totally legit.)

"I'm quite overwhelmed and relieved. It has been very, very stressful the last few weeks to actually get here on time and incredibly tiring and mentally taxing to plan the route, stick to it and get the exact miles," Carr said after crossing the finish line. Why was it so stressful at the end? Because Carr was fighting against the clock—he only broke the record by one day. (That really puts your "stress-y moments into perspective, huh?)

As if this physical achievement weren't awe-inspiring enough, we're just as blown away by his motivation to take on the mission. Carr, who has previously suffered from depression, took on the challenge to raise money for mental health charity SANE. "I aimed to provide a very real demonstration that an 'ill mind' is in no way a 'weak mind' and that there is no shame in mental illness and it needn't hold you back," he said.